Adopt naming schema from other controls in Mixxx for effect parameters

With this PR, we are more in line with the rest of Mixxx. 
Now we have: 
 * parameterN
 * parameterN_up
 * parameterN_down
 * parameterN_up_small
 * parameterN_down_small
 * parameterN_set_default
 * parameterN_set_zero
 * parameterN_set_one
 * parameterN_set_minus_one
 * parameterN_toggle
 * parameterN_minus_toggle
 * parameterN_loaded
 * parameterN_link_type
 * parameterN_value_type
 * parameterN_value_max
 * parameterN_value_max_limit
 * parameterN_value_min
 * parameterN_value_min_limit